Merge branch 'hotfix/0.0.9'

* hotfix/0.0.9:
  bump version to 0.0.9
  update demo
  build
  allow a custom url to be set on each directive
  check against an empty string, too
  update comment
Merge branch 'develop'

* develop:
  provide a specific image for pinterest
make demo responsive
Merge branch 'master' into develop

* master:
  make demo responsive